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7 Series DIY
Do It Yourself forum dedicated for 7 Series BMW Owners

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  #1  
Old 02-26-2013, 02:32 PM
Keif Keif is offline
Master Tinkerer
Location: Houston, TX
 
Join Date: Mar 2008
Posts: 2,196
Mein Auto: 2007 Alpina B7
DIY - E65 Alpina B7 - Supercharger / intake manifold / valve cover / head removal

Issue:
Misfire on cylinder 1.

Diagnostics:
Nothing significant visually or functionally wrong with spark plug, coilpack, injector, nor valvetrain components when viewing with valve cover removed. Low compression found on cylinder 1.

Reason:
Chipped exhaust valve; chips out of valve allowed air to blow past the valve when closed, and thus not fully compress.

Time taken:
A long damn time (about 2 months of evenings here and there).

While TIS says to remove the world (i.e. the engine) do to this, I didn't have the space this time around. So, the basic process was: remove supercharger, intake manifold, valve cover, VANOS adjusters (timing gears), then remove the head with the exhaust manifold and catalytic converter still attached, hulk style. Removing the head this way was actually very manageable, and I had no trouble removing and reinstalling it - 4 times I think - once I figured out how to maneuver it properly to pass the catalytic converter past the starter; rotate the head toward the passenger side of the car, lift the front a little, and slide the head toward the front of the car about a foot, then up and out.

Since I had the head out and was taking it to a machine shop anyway (cleaning, evaluation of the other valves and valve seats), I decided to have them press in new valve guides and replace the valve stem seals while they had everything disassembled. Apparently the valve guides are brass or some soft metal and wear out, eventually causing the smoking issue where we end up replacing our valve stem seals. Additionally, this shop said that the valve guide issue is related largely to valve angle, and happens almost exclusively to the exhaust valves, which would kind of stand to reason, given they have the nearest to horizontal angle.

--> Here <-- are some pictures from my adventure. I will be labeling and putting descriptions in soon.
__________________
 
Black 2007 Alpina B7
Tension strut bushings
 
White 2007 Alpina B7
Supercharger clutch/bearings, replaced exhaust valve/pulled head, sunroof seal, 6000K angel eyes
 
Black 2002 BMW 745Li (sold)
KW v3's, blue angel eyes, 8000K headlights & HID fogs, rebuilt alternator & mounting bracket gasket, sunroof seal, CCVs, plugs, sway bar bushings, timing & valve cover gaskets, valve stem seals, guibo joint, mechatronic sealing sleeve, trans fluid, sanded headlights...

Last edited by Keif; 02-27-2013 at 07:22 AM.
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  #2  
Old 02-26-2013, 02:33 PM
Keif Keif is offline
Master Tinkerer
Location: Houston, TX
 
Join Date: Mar 2008
Posts: 2,196
Mein Auto: 2007 Alpina B7
< Reserved >
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  #3  
Old 06-03-2013, 02:20 PM
networksolution networksolution is offline
Registered User
Location: azerbaijan
 
Join Date: Jun 2013
Posts: 2
Mein Auto: alpina b7
I have the same problem with first cylinder, alpine b7 2004.06 Dubai version. I don't now how this problem can fixed, can you help me about it?
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  #4  
Old 09-22-2013, 06:07 PM
schpenxel schpenxel is offline
DIY'er
Location: Greensboro, NC
 
Join Date: Nov 2009
Posts: 3,208
Mein Auto: 2004 545i
Question: Any idea if this method will work on an E60?
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alpina, b7, e65, e66, exhaust, head, intake, manifold, supercharger, timing, valve cover, vanos


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